Road Frustration Index

Because Audi wants you to know just how much traffic will be stifling your high-performance sedan, they collaborated with MIT to bring you this interactive site providing real-time indices for driver frustration in 30 US metro areas, determined using data on weather conditions, road construction & accident reports, and the percentage of drivers currently tweeting their road rage about some other a-hole who got into an accident while tweeting about their road rage.